So I finally got around to using HLT with my GoPro Hero 4 Black Edition with GoPoint BT1.
My issues from that track day are the laptimer records the session time but doesn't display each individual lap.
Laptimer recognises when I drive out onto the track even though I started manual recording in this video so I don't think it's the loaded track but I don't know what's going on so happy to be corrected!

The overlay is out of sync as well. I went into expert settings and played around with the overlay delay time but it still doesn't seem to see look right.
Any help would be appreciated!
Info -
HLT Grand Prix
iPhone 6S
GPS - iPhone
GoPoint BT1 OB2
GoPro Hero 4 Black
Track - Hidden Valley Raceway, Darwin, Northern Territory, Australia
Car - Honda Civic TypeR (EP3)
[youtube]https://www.youtube.com/watch?v=0X5gDEJRRm4[/youtube]